ABSTRACT
The authors have seen three cancers out of 27 organic ovarian tumours which were diagnosed and operated on during pregnancy and the puerperium in 16790 deliveries. They recall the circumstances under which the condition was discovered and the difficulties in diagnosing it. They point out particularly the value of ultrasound and frozen section histological examination. They point out the therapeutic problems which are often of a dramatic nature because of the association of the two conditions and the prognosis which in turn depends mainly on the stage of the lesion and the operability of the tumour. Poor maternal prognosis in cases of ovarian cancer is an indication for operation before the 20th week of pregnancy of all tumours of the ovary which have been clinically diagnosed and confirmed by ultrasound.